I started a game in hamlet, then travelled to a shipwrecked world.
I crafted the Brain of thoughts and equipped it.
The volcanic tab doesn't appear, even if I wear the brain of thought inside the volcano.
I then travelled to a ROG wolrd, equipped the brain of thoughts, couldn't access the ancient tab.
TLDR; Brain of thoughts doesn't allow access to volcanic tab/ ancient tab in shipwreck/ROG worlds. It works as usual for items from other tabs though.
Equip brain of thought then try to access volcanic tab in a shipwreck orld or ancient tab in a rog world